Optical: systems and elements – Lens – Including a nonspherical surface
Reexamination Certificate
2007-02-16
2009-12-08
Schwartz, Jordan M. (Department: 2873)
Optical: systems and elements
Lens
Including a nonspherical surface
C359S708000
Reexamination Certificate
active
07630147
ABSTRACT:
Apparatus, systems, methods and devices of an optical system for producing a laser beam having pitchfork profile. The system includes a laser source providing an input Gaussian beam, refractive optical lenses for converting the input Gaussian beam into a super Gaussian beam. A focusing lens focuses the super Gaussian beam, where by diffraction effect after the focusing lens, the beam profile near a focal spot is a pitchfork shaped beam. In an embodiment, the refractive optical lenses are plano-aspheric lenses. The pitchfork shaped beam is produced by passing the input Gaussian beam through plano-aspheric lenses to produce the super Gaussian output beam, and passing the super Gaussian output beam through a focusing lens to produce the output beam having a pitchfork profile. In an embodiment, the pitchfork shaped beam is applied to laser microvias drilling in electronic packaging to produce residue free holes at reduced production cost with simplified procedures.
REFERENCES:
patent: 6295168 (2001-09-01), Hoffnagle et al.
patent: 7355166 (2008-04-01), Sherrer et al.
patent: 7400457 (2008-07-01), Cayer
patent: 2005/0069007 (2005-03-01), Kennedy et al.
patent: 2007/0140092 (2007-06-01), Frangineas
patent: 2007/0193987 (2007-08-01), Bischoff et al.
M. Arif, M. Hossain, A. Awwal, M. Islam, “Two-element refracting system for annular Gaussian-to-Bessel beam Transformation”Applied Optics, vol. 37, No. 19 (Jul. 1, 1998), pp. 4206-4209.
D. Zeng, W. P. Latham, A. Kar, “Shaping of annular laser intensity profiles and their thermal effects for optical trepanning”Optical Engineering, vol. 45, (1), (Jan. 2006) pp. 014301-1/014301-9.
J. Liu, M. Thomson, A Waddie, M. Taghizadeh, “Design of diffractive optical elements for high-power laser applications”Optical Engineering, vol. 43 (11), (Nov. 2004), pp. 2541-2548.
Y. Abdelaziez, P. Banerjee, D. Evans, “Beam shaping by use of hybrid acousto-optics with feedback”Applied Optics, vol. 44, No. 17, (Jun. 2005), pp. 3473-3481.
K. Sugioka, B. Gu, A. Holmes, “The State of the Art and Future Prospects for Laser Direct-Write for Industrial and Commercial Applications”,MRS Bulletin, vol. 32, (Jan. 2007), pp. 47-54.
Kar Aravinda
Quick Nathaniel R.
Zhang Chong
Law Offices of Brian S. Steinberger , P.A.
Schwartz Jordan M.
Steinberger Brian S.
University of Central Florida Research Foundation Inc.
Wood Phyllis K.
LandOfFree
Laser beam shaping for pitchfork profile does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser beam shaping for pitchfork profile, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser beam shaping for pitchfork profile will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4072866